Have Cat Questions? Ask a Cat Vet Online.
How old does the cat look?
does she have a lot of fur growing near her toes?
can she climb?
If she is clean and looks well fed she may be someones pet. The best thing to do is try to get her to come indoors where you can monitor her but keep her separated from your cat until you have her checked for feline diseses.
Please let me know what happens.